Wikipedia about laser printing
Laser printing is an electrostatic digital printing process. It produces high-quality text and graphics (and moderate-quality photographs) by repeatedly passing a laser beam back and forth over a negatively charged cylinder called a "drum" to define a differentially charged image.1 The drum then selectively collects electrically charged powdered ink (toner), and transfers the image to paper, which is then heated in order to permanently fuse the text, imagery, or both. As with digital photocopiers, laser printers employ a xerographic printing process. However, laser printing differs from analog photocopiers in that the image is produced by the direct scanning of the medium across the printer's photoreceptor. This enables laser printing to copy images more quickly than most photocopiers.
Źródło: https://en.wikipedia.org/wiki/Laser_printing
Toners for printers at the best price
The cheapest toners for printers can be found in computer and internet stores as well as in large shopping centers. It should be emphasized that reaching for the cheapest printer toners does not necessarily mean that they will not have good quality. This is because even replacements are produced according to generally accepted standards. In contrast, cheap printer toners can be released for sale by companies that can reduce the cost of their production or be covered by some kind of promotions or rebates. Thanks to that, their buying does not strain the home or company budget and allows for even bigger savings. On the other hand, it can be said that it allows the sellers themselves to acquire new customers.
Connecting printers with a scanner
Sales of printers with a scanner is now a very good way to run a profitable business. This is because these types of printers have many customers who want to own them in their homes or companies. Therefore, both small printers with an additional scanner and large scanning devices go on sale. They work perfectly in offices, schools, in the back of the shop or at universities. Therefore, it is not uncommon to sell printers with a scanner, and then you can order almost any number of such devices and they will be delivered almost instantly to the delivery address.